Which Danish monarch was also King of England from 1016 until 1035?

Cnut, also spelled Canute, was a Viking King of England, Denmark and Norway. In 1015, he set sail for England with a Danish army of 10,000 soldiers in 200 longships. He defeated all the men led by the English King Edmund Ironside at the Battle of Assandun in Essex. When Edmund died of unknown causes on 30th November 1016, Cnut took the throne as King of England.

Cnut was the son of Swein Forkbeard, the King of Denmark from 986-1014. Cnut probably succeeded to the throne of Denmark after the death of his brother Harald in 1019, by which time Cnut was already King of England.

Cnut played a major role in European politics. He attended the coronation of the Holy Roman Emperor, Conrad II, in Rome in 1027, and arranged for his daughter to marry the Emperor's son.

In 1020, Cnut made active efforts to establish the English Church. He gave land to Christ Church, Canterbury, and helped fund the New Minster in Winchester.

A famous legend about Cnut claims he sat on the seashore and tried to command the waves to stay still. Naturally, the sea ignored him. The story appears in chronicles written more than a century after Cnut died, so it is unlikely the event ever occurred.